Under what circumstances can a very small treatment effect be statistically significant?
A)if the sample size big and the sample variance is small
B)if the sample size and the sample variance are both big
C)if the sample size is small and the sample variance is big
D)if the sample size and the sample variance are both small

Question

Quizplus · Accepted Answer

A very small treatment effect can be statistically significant if the sample size is large and the sample variance is small, as this increases the power of the statistical test to detect even small effects.

Under What Circumstances Can a Very Small Treatment Effect Be